Strawberry plant named ‘Opera’

ABSTRACT

A new and distinct cultivar of Strawberry plant named ‘Opera’, characterized by its compact and semi-upright plant habit; moderately vigorous to vigorous growth habit; uniform fruit ripening; large broadly rounded to conical fruits that are glossy and red in color; pleasant fruit aroma and taste; excellent fruit postharvest longevity; and moderately resistant to  Verticillium dahliae  and  Phytophthora cactorum.

Botanical designation: Fragaria×ananassa.

Cultivar denomination: ‘OPERA’.

BACKGROUND OF THE INVENTION

The present Invention relates to a new and distinct cultivar of Strawberry plant, botanically known as Fragaria×ananassa and hereinafter referred to by the name ‘Opera’.

The new Strawberry plant is a product of a planned breeding program conducted by the Inventor in Elst, Gelderland, The Netherlands. The objective of the breeding program was to develop new early-ripening Strawberry plants with good fruit quality, ease of harvesting, good postharvest longevity and resistance to pathogens.

The new Strawberry plant originated from a cross-pollination by the Inventor during the spring of 2004 in Elst, Gelderland, The Netherlands of a proprietary selection of Fragaria×ananassa identified as code name E1998-142, not patented, as the female, or seed, parent with an unnamed seedling selection of Fragaria×ananassa, not patented, as the male, or pollen, parent. The new Strawberry plant was discovered and selected by the Inventor as a single plant from within the progeny of the stated cross-pollination in a controlled environment in Elst, Gelderland, The Netherlands during the summer of 2006.

Asexual reproduction of the new Strawberry plant by runner cuttings in a controlled environment at Elst, Gelderland, The Netherlands since the autumn of 2006, has shown that the unique features of this new Strawberry plant are stable and reproduced true to type in successive generations of asexual reproduction.

SUMMARY OF THE INVENTION

Plants of the new Strawberry have not been observed under all possible combinations of environmental conditions and cultural practices. The phenotype may vary somewhat with variations in environmental conditions such as temperature and light intensity, without, however, any variance in genotype.

The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘Opera’. These characteristics in combination distinguish ‘Opera’ as a new and distinct Strawberry plant:

-   -   1. Compact and semi-upright plant habit.     -   2. Moderately vigorous to vigorous growth habit.     -   3. Uniform fruit ripening.     -   4. Large broadly rounded to conical fruits that are glossy and         red in color.     -   5. Pleasant fruit aroma and taste.     -   6. Excellent fruit postharvest longevity.     -   7. Moderately resistant to Verticillium dahliae and Phytophthora         cactorum.

Plants of the new Strawberry differ primarily from plants of the female parent selection in the following characteristics:

-   -   1. Plants of the new Strawberry are more upright and not as         globose as plants of the female parent selection.     -   2. Plants of the new Strawberry have darker green-colored leaves         than plants of the female parent selection.     -   3. Fruits of plants of the new Strawberry are broadly rounded to         conical in shape whereas fruits of plants of the female parent         selection are conical in shape.

Plants of the new Strawberry differ primarily from plants of the male parent selection in fruit size as plants of the new Strawberry produce much larger fruits than plants of the male parent selection.

Plants of the new Strawberry can be compared to plants of Fragaria L. ‘Sonata’, disclosed in U.S. Plant Pat. No. 18,000. In side-by-side comparisons, plants of the new Strawberry differ primarily from plants of ‘Sonata’ in the following characteristics:

-   -   1. Plants of the new Strawberry are larger than plants of         ‘Sonata’.     -   2. Plants of the new Strawberry are more upright than and not as         globose than plants of ‘Sonata’.     -   3. Plants of the new Strawberry have larger leaves with longer         petioles than plants of ‘Sonata’.     -   4. Plants of the new Strawberry have larger flowers with larger         petals than plants of ‘Sonata’.     -   5. Fruits of plants of the new Strawberry are heavier and darker         red in color than fruits of plants of ‘Sonata’.     -   6. Fruits of plants of the new Strawberry are firmer than fruits         of plants of ‘Sonata’.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying colored photographs illustrate the overall appearance of the new Strawberry plant showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photographs may differ slightly from the color values cited in the detailed botanical description which accurately describe the colors of the new Strawberry plant.

The photograph on the first sheet is a side perspective view of a typical flowering and fruiting plant of ‘Opera’ grown in a container.

The photograph on the second sheet is a close-up view of a typical fully opened flower of ‘Opera’.

The photograph on the third sheet is a close-up view of typical developed fruits of ‘Opera’.

The photograph on the fourth sheet is a close-up view of the upper surface of typical leaves of ‘Opera’.

The photograph on the fifth sheet is a close-up view of the lower surface of a typical fully opened flower of ‘Opera’.

The photograph on the sixth sheet comprises longitudinal cross-sectional views of typical fruits of ‘Opera’.

DETAILED BOTANICAL DESCRIPTION

The aforementioned photographs, following observations and measurements describe plants grown in 2.5-liter containers during the spring and summer in a glass-covered greenhouse in Elst, Gelderland, The Netherlands and under cultural practices typical of commercial Strawberry production. During the production of the plants, day temperatures ranged from 15° C. to 25° C. and night temperatures ranged from 7° C. to 14° C. Plants were one year old when the photographs and description were taken. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2001 Edition, except where general terms of ordinary dictionary significance are used.

-   Botanical classification: Fragaria×ananassa ‘Opera’. -   Parentage:     -   -   Female, or seed, parent.—Proprietary seedling selection of             Fragaria×ananassa identified as code name E1998-124, not             patented.         -   Male, or pollen, parent.—Unnamed seedling selection of             Fragaria×ananassa, not patented. -   Propagation:     -   -   Type.—By runner cuttings.         -   Time to initiate roots, summer.—About one to four days at             soil temperatures about 15° C.         -   Time to produce a rooted young plant, summer.—About two             weeks at soil temperatures ranging from 18° to 20° C.         -   Root description.—Medium in thickness, fibrous; typically             cream white to white in color, actual color of the roots is             dependent on substrate composition, water quality,             fertilizer type and formulation, substrate temperature and             physiological age of roots.         -   Rooting habit.—Moderately freely branching; medium density. -   Plant description:     -   -   Plant and growth habit.—Perennial; compact and semi-upright             plant habit; leaves basal; moderately vigorous to vigorous             growth habit; moderate growth rate; moderately densely             foliated and bushy to somewhat open canopy.         -   Plant height.—About 25 to 35 cm.         -   Plant diameter.—About 40 to 55 cm.         -   Stolon texture.—Sparsely pubescent.         -   Stolon color and texture.—Close to 145A occasionally tinged             with close to 185A. -   Leaf description:     -   -   Arrangement and appearance.—Basal rosette; compound with             typically three or four leaflets per leaf; relatively large             non-variegated leaves.         -   Leaflet length.—About 10 to 13.5 cm.         -   Leaflet width.—About 11 to 13.5 cm.         -   Leaflet shape.—Broadly ovate; terminal leaflet, concave.         -   Leaflet apex.—Obtuse to acute.         -   Leaflet base.—Obtuse to rounded.         -   Leaflet margin.—Serrate to lobed.         -   Leaflet texture and luster, upper surface.—Pubescent; weakly             blistered; moderately glossy.         -   Leaflet texture and luster, lower surface.—Pubescent, rough;             matte.         -   Leaflet venation.—Pinnate.         -   Leaflet color.—Developing leaflets, upper surface: Close to             137A. Developing leaflets, lower surface: Close to 138A.             Fully expanded leaflets, upper surface: Close to between             137A and 139A; venation, close to 144C. Fully expanded             leaflets, lower surface: Close to 138A; venation, close to             144C.         -   Stipule color.—Close to 137B occasionally tinged with close             to 185A.         -   Petioles.—Length: About 20 to 35 cm. Diameter: About 2.5 to             6 mm. Texture, upper and lower surfaces: Pubescent; attitude             of hairs, outwardly to horizontal. Color, upper and lower             surfaces: Close to 145A. -   Flower description:     -   -   Flower form and flowering habit.—Rotate flowers arranged             singly at lateral apices; flowers held at the foliar plane;             about 30 to 50 flowers developing per plant; flowers are             self-fertile.         -   Fragrance.—None detected.         -   Natural flowering season.—Plants flower in late April to             early May in The Netherlands, considered early to midseason.         -   Flower diameter.—About 2.5 to 3.5 cm.         -   Flower depth (height).—About 6 mm to 11 mm.         -   Petals.—Arrangement: Single whorl of five or six petals;             petals not imbricate. Length: About 1 cm to 1.3 cm. Width:             About 1 cm to 1.4 cm. Shape: Round to broadly ovate. Apex:             Rounded. Base: Attenuate. Margin: Entire. Texture, upper and             lower surfaces: Smooth, glabrous; satiny. Color: When             opening and fully opened, upper surface: Close to 155D. When             opening and fully opened, lower surface: Close to 155D.         -   Sepals.—Arrangement and calyx description: Single whorl of             10 to 16 sepals; calyx, star-shaped; calyx adherence is weak             to moderate; sepal attachment is initially inserted with             primary and secondary fruits and becoming more level with             subsequent fruit production; sepals are orientated upwards             from the fruit. Calyx diameter: About 1 cm to 2.5 cm.             Length: About 1 cm to 2 cm. Width: About 5 mm to 8 mm.             Shape: Lanceolate to ovate. Apex: Acute. Base: Fused.             Margin: Entire. Texture, upper and lower surfaces:             Pubescent. Color, upper and lower surfaces: Close to 137A.         -   Peduncles.—Length: About 7 cm to 10 cm. Diameter: About 1 mm             to 2 mm. Strength: Strong. Texture: Pubescent. Color: Close             to 144B.         -   Pedicels.—Length: About 4 cm to 10 cm. Diameter: About 1.5             mm to 3 mm. Strength: Strong. Texture: Pubescent; attitude             of hairs, outwardly to horizontal. Color: Close to 144B.         -   Reproductive organs.—Stamens: Quantity per flower: About 25             to 30. Anther length: About 2 mm. Anther shape: Lanceolate             to elliptic. Anther color: Close to 14B. Pollen amount:             Abundant. Pollen color: Close to 15C. Pistils: Quantity per             flower: About 30. Pistil length: About 1 mm to 2 mm. Stigma             shape: Rounded. Stigma color: Close to 5A. Fruits: Quantity             per truss: About seven to eight. Natural fruiting season:             Relatively early and long fruiting season, plants develop             fruit during the summer in The Netherlands, ripening time             considered midseason; fruiting is non-remontant. Postharvest             longevity: About ten days at 7° C. Length: About 2 cm to             4 cm. Diameter: About 3 cm to 6 cm. Shape: Primary fruits             are relatively large and are round in shape; secondary             fruits are smaller and conical to cone-shaped. Fruit cavity             length: About 1.3 cm. Fruit cavity width: About 8 mm. Fruit             weight per fruit, first quality: About 26.5 g. Fruit weight             per plant, first quality: About 470 g. Firmness: Firm.             Fragrance, taste: Pleasant; good balance between sweetness             and acidity. Acidity: About 14.8 mmol H₃O/100 g. Sweetness:             About 9.2 Brix. Luster: Uniformly glossy. Surface             unevenness: Smooth. Color, surface: Close to 181A. Color,             flesh: Close to 45A. Color, core: Close to 34A. Seed             density: Medium. Achene position: Level with surface,             slightly indented; width of band without achenes, relatively             small. Achene weight: About 0.000667 g. Achene color: Close             to 4A. -   Disease and pest resistance: Plants of the new Strawberry have been     observed to be moderately resistant to Verticillium dahliae and     Phytophthora cactorum. Plants of the new Strawberry have not been     observed to be resistant to pests and other pathogens common to     Strawberry plants. 

It is claimed:
 1. A new and distinct Strawberry plant named ‘Opera’ as illustrated and described. 